支撑液膜法提取稀土的动力学

研究了以聚丙稀为支撑膜，以二（２－乙基已基）磷酸为载体提取稀土的支撑液膜体系。通过实验确定为料液的ｐＨ值，载体浓度等与稀土离子渗透系数之间的关系；建立了动力学方程；并计算了料液－膜侧传质边界层的厚度和稀土配合物在膜内的扩散系数。     

无溶剂自流平环氧地坪涂料的配制及施工

无溶剂自流平环氧地坪涂料无挥发性有机物（VOC）排放，不仅具有优良的耐水、耐磨，耐油污及耐化学药品腐蚀等特性，而且具有附着力好，机械强度高，固化后漆膜收缩率低，绝缘不助燃等优点，介绍该涂料的配制及施工技术。     

介质黏度对PCC分散体系流变行为的影响

在AR2000ex型流变仪上对沉淀碳酸钙(Precipitated calcium carbonate,PCC)在PEG(聚乙二醇)悬浮体系进行稳态剪切流变实验。通过2种方法来改变分散体系黏度:1)以PEG200(相对分子质量为200)为连续相,分散体系以10℃为间隔从10℃上升至50℃;2)在30℃用相同的聚合物3种不同相对分子质量的PEG(PEG200、PEG400和PEG600)。结果表明随着温度升高,PCC/PEG200分散体系的临界剪切速率越来越大。在剪切增稠区内流动指数N随温度升高而降低,稠度系数K随着温度升高而升高。临界剪切速率以及临界剪切黏度与温度严格满足Arrhenius关系:η=A exp[Ea/(RT)]。研究发现随温度的变化临界剪切应力不变。随着PEG的相对分子质量增加,分散体系的黏度增加,临界剪切增稠速率减小。PCC粉末的分形结构以及聚集体的形貌使得体系的相对黏度远大于硬球体系的相对黏度。     

Kinetics Study on the Thermal Decomposition of Europium p-methyl benzoate Complex with 1, 10-penanthroline under Non-isothermal Con ditions

The thermal decomposition reaction of Eu2(p-MBA)6(PHEN)2 (p-MBA=CH3C6H4COO, methylbenzoate;PHEN=C12H8N2, 1,10-phenanthroline) was studied in a static atmosphere usingTG-DTG method. The thermal decom position process of the complex was determined and its kinetics was investigated. Kinetic parameters were obtained from the analysis of TG-DTG curves by means of the Achar method and the Madhusudanan-Krishnan-Ninan (MKN) method.The most probable mechanism functions of the thermal decomposition reaction for the first stage are: f(α)= (1-α)2,g(α) = (1 -α) 1- 1. The activation energy for the first stage is 255.18 k J/mol, the entropy of activation AS is 227.32 J/mol and the Gibbs free energy of activation AG is 128.04 k J/mol.     

甘油锌的合成及其光稳定作用研究

介绍了甘油锌配合物的合成方法，研究了影响产物合成的主要因素，测试了产品的红外光谱、物化性能及光稳定作用。结果表明：在甘油与氧化锌质量比为7：1，260℃及0.5gZA作用下反应1.5h得到的甘油锌不仅光稳定性能好，而且无毒、不着色。     

碱土铝酸盐长余辉发光颜料表面包膜的研究

采用四乙氧基硅(TEOS)为硅包膜剂,在SrAl₂O₄:Eu²⁺,Dy³⁺发光颜料颗粒表面进行包膜,通过扫描电镜(SEM)、粒度测量、BET比表面积测试及X射线光电子能谱(XPS)分析,证实发光颜料颗粒表面包覆了一层厚度约为14nm的致密均匀的SiO₂纳米膜.耐水性能及发光性能测试表明,包膜后发光颜料耐水性明显改善,发光性能变化较小.分析表明包膜过程实际上是水合二氧化硅在颜料颗粒表面的溶胶-凝胶过程,其最佳工艺条件为:包膜溶液pH约为10;包膜温度控制在80℃;包膜时间为3.0h.     

Bone-like apatite formation on HA/316L stainless steel composite surface in simulated body fluid

HA/316L stainless steel(316L SS) biocomposites were prepared by hot-pressing technique. The formation of bone-like apatite on the biocomposite surfaces in simulated body fluid(SBF) was analyzed by digital pH meter, plasma emission spectrometer, scanning electron microscope(SEM) and energy dispersive X-ray energy spectrometer(EDX). The results indicate that the pH value in SBF varies slightly during the immersion. It is a dynamic process of dissolution-precipitation for the formation of apatite on the surface. With prolonging immersion time, Ca and P ion concentrations increase gradually, and then approach equilibrium. The bone-like apatite layer forms on the composites surface, which possesses benign bioactivity and favorable biocompatibility and achieves osseointegration, and can provide firm fixation between HA60/316L SS composite implants and human body bone.     

淮北大堤加固工程江苏段征地拆迁及移民安置工作回顾与总结

回顾总结淮北大堤加固工程的征地拆迁及移民安置工作,针对遇到的实际问题给出解决办法,提出改进水利工程征地拆迁补偿工作的建议.     

酸性有机磷萃取剂的研究及其应用

本文综述了酸性有机磷萃取剂对金属离子的萃取研究,讨论了萃取剂结构、萃合物组成和构型以及温度等对萃取性能的影响因素。介绍了酸性有机磷萃取剂在湿法冶金等方面的广泛应用。